Across
- 2. horizontal columns
- 4. vertical columns
- 6. founder ofneutrons
- 8. an atom cannot be destroyed or created,just rearranged in a
- 9. where protons and neutrons are located
- 10. all matter is made up of atoms
- 13. equal to number of protons
- 14. atomic,protons,electron
- 17. no charge
- 18. building blocks of matter
- 20. one or two letter
Down
- 1. number sum of all weight
- 3. where to look up elements
- 5. founder of proton
- 7. fonder of electrons
- 11. how to find mass
- 12. number sum of protons and neutrons
- 15. negative charge
- 16. positive charge
- 19. a substance that can't be broken down